HTML Table Checker

This program is designed for people who write HTML code from scratch. It looks for tables and examines them to be sure that all of the required tags are present, that all of the cells have data, and that none of the rowspan or colspan tags cause cells to extend outside the dimensions of the table. Any of these problems can lead to the table displaying incorrectly (or not at all!) in some browsers.

The results page, in addition to showing the source code and any errors, also includes diagrams to show how the tables' cells are arranged, like in this example:

1: <table>
2:   <tr>
3:     <td rowspan=2>₁cell 1</td>
4:     <td>₁cell 2</td><td>₂cell 3</td>
5:   </tr>
6:   <tr>
7:     <td colspan=2>₁cell 4</td>
8:   </tr>
9: </table>
   This table is not nested. It is in lines 1-9.



[line number]_{[index of <td> tag on line]} Row in line(s)

3₁ 4₁ 4₂ 2-5

7₁ 6-8

This shows that the first row of the table spans lines 2-5 of the source code. The first cell in the top row is on line 3 of the source, and has a rowspan of 2. The remaining two cells in the top row are on line 4 of the source, in the first and second index positions. The bottom row has a cell with a colspan of 2.